Large-area superelastic graphene aerogels based on a room-temperature reduction self-assembly strategy for sensing and particulate matter (PM2.5 and PM10) capture

• DOI: 10.1039/c9nr02071c
• Publication Date: 2019-04-24T02:34:13Z
• Authors: Shuang Yan; Gongzheng Zhang; Feibo Li; Li Zhang; Sitong Wang; Huhu Zhao; Qi Ge; Huanjun Li
• Keywords: Pseudoelasticity

Graphene aerogels are emerging low density and superelasticity macroscopic porous materials with various applications. However, it still remains a challenge to develop versatile strategy under ambient conditions for fabricating large-area, high-performance graphene aerogels, which is crucial their practical Here, we report novel room-temperature reduction self-assembly (RTRS) fabricate large-area conditions. The based on using unique hydrazine hydrates as reducing agents generate stable microbubbles beneficial the formation of macroporous hydrogels. Interestingly, resultant hydrogel followed by simple pre-freeze treatment can be naturally dried into without noticeable volume shrinkage or structure cracking. Benefiting from mild conditions, aerogel diameter up 27 cm was prepared an example. as-formed exhibit honeycomb-like coarse-pores structure, 3.6 mg cm-3 (rapidly recoverable 95% compression) suitable pressure/strain sensors. Moreover, exhibits superior particulate matter adsorption efficiency (PM2.5: 93.7%, PM10: 96.2%) good recycling ability. Importantly, preparation process cost-effective easily scalable need any special drying techniques heating processes, provides ideal platform mass production toward